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There are 7 twelve-letter words containing M, O, P, 3S, T and Y

PHOTOSYSTEMSphotosystems n. Plural of photosystem.
PHOTOSYSTEM n. either of two photochemical reaction centers consisting chiefly of photosynthetic pigments complexed with protein and occurring in chloroplasts.
PHYSOSTOMOUSphysostomous adj. (Zoology) Having a duct to the air bladder.
physostomous adj. (Zoology) Relating to the Physostomi.
PHYSOSTOMOUS adj. of fishes, having a duct connecting the air bladder to part of the alimentary canal.
POLYMASTISMSPOLYMASTISM n. the presence of supernumerary breasts or nipples, also POLYMASTIA, POLYMASTY.
PROSELYTISMSproselytisms n. Plural of proselytism.
PROSELYTISM n. conversion.
SCYPHISTOMASscyphistomas n. Plural of scyphistoma.
SCYPHISTOMA n. the fixed polypoid stage in the life cycle of a scyphozoan, which reproduces asexually by budding or strobilation.
SPASMOLYTICSspasmolytics n. Plural of spasmolytic.
SPASMOLYTIC n. a spasmolytic drug.
SYNAPTOSOMESsynaptosomes n. Plural of synaptosome.
SYNAPTOSOME n. a nerve ending that is isolated from homogenized nerve tissue.

Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.
Definitions are short excerpt from the WikWik.org and 1Word.ws.

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See this list for:

  • English Wiktionary: 13 words
  • Scrabble in French: 3 words
  • Scrabble in Spanish: no word
  • Scrabble in Italian: no word
  • Scrabble in German: no word
  • Scrabble in Romanian: no word


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